EFFECT OF ADDITIONAL LOW INTENSITY LUMINESCENCE RADIATION 625nm ON PLANT GROWTH AND PHOTOSYNTHESIS

var. Cymosa)plants were grown in a glass greenhouse under natural radiation in summer.A half of pots with plants were placed under an ordinary (control) and theother part under the "Redlight" (experimental variant) polyethylene films,both 100/lm thick. The Redlight film had the same transmittance buttransformed 3.5% of ultraviolet light falling on a plant into fluorescentradiation with a main maximum of 625 nm. Plants grown under modifiedsolar radiation exhibited high intensity of photosynthesis at light saturation, ashift of saturation region to the higher level of radiation, as well as highefficiency of photosynthesis under low light intensity. An appreciable increasein the CO